﻿// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

namespace System.Windows.Forms;

/// <summary>
///  We need a special way to defer to the ListView's image list for indexing purposes.
///  ListViewItemImageIndexer is a class used to support <see cref="ListViewItem.ImageIndex"/> and
///  <see cref="ListViewItem.ImageKey"/>.
/// </summary>
internal class ListViewItemImageIndexer : ImageList.Indexer
{
    private readonly ListViewItem _owner;

    /// <summary>
    ///  Initializes a new instance of the <see cref="ListViewItemImageIndexer"/> class.
    /// </summary>
    /// <param name="item">The <see cref="ListViewItem"/> that this object belongs to.</param>
    public ListViewItemImageIndexer(ListViewItem item)
    {
        _owner = item;
    }

    /// <summary>
    ///  Gets the <see cref="ListViewItem.ImageList"/> associated with the item.
    /// </summary>
    public override ImageList? ImageList
    {
        get => _owner.ImageList;
        set => Debug.Fail("We should never set the image list");
    }
}
